Patents by Inventor Khaled H. El-Maleh
Khaled H. El-Maleh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8358617Abstract: Wideband speech signals must be converted to narrowband speech signals if the transmission medium or the destination terminal is constructed with narrowband constraints. A typical wideband-to-narrowband conversion method is the elimination of frequencies above 3400 Hz using a low pass filter and a down sampler. However, this method produces a muffled speech sound since the resulting narrowband signal has a flat frequency response. Methods and apparatus are presented herein to enhance the acoustic quality of a wideband-to-narrowband converted signal. A bandwidth switching filter is used to emphasize a mid-range frequency portion of the wideband signal so that the resulting narrowband signal has a non-flat frequency spectrum.Type: GrantFiled: July 10, 2009Date of Patent: January 22, 2013Assignee: QUALCOMM IncorporatedInventors: Khaled H. El-Maleh, Arasanipalai K. Ananthapadmanabhan, Andrew P. DeJaco
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Patent number: 8243695Abstract: A system and method for detection of rate determination algorithm errors in variable rate communications system receivers. The disclosed embodiments prevent rate determination algorithm errors from causing audible artifacts such as screeches or beeps. The disclosed system and method detects frames with incorrectly determined data rates and performs frame erasure processing and/or memory state clean up to prevent propagation of distortion across multiple frames. Frames with incorrectly determined data rates are detected by checking illegal rate transitions, reserved bits, validating unused filter type bit combinations and analyzing relationships between fixed code-book gains and linear prediction coefficient gains.Type: GrantFiled: August 7, 2009Date of Patent: August 14, 2012Assignee: QUALCOMM IncorporatedInventors: Khaled H. El-Maleh, Eddie-Lun Tik Choy, Arasanipalai K. Ananthapadmanabhan, Andrew P. DeJaco, Pengjun Huang
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Publication number: 20100036668Abstract: A system and method for detection of rate determination algorithm errors in variable rate communications system receivers. The disclosed embodiments prevent rate determination algorithm errors from causing audible artifacts such as screeches or beeps. The disclosed system and method detects frames with incorrectly determined data rates and performs frame erasure processing and/or memory state clean up to prevent propagation of distortion across multiple frames. Frames with incorrectly determined data rates are detected by checking illegal rate transitions, reserved bits, validating unused filter type bit combinations and analyzing relationships between fixed code-book gains and linear prediction coefficient gains.Type: ApplicationFiled: August 7, 2009Publication date: February 11, 2010Applicant: QUALCOMM IncorporatedInventors: Khaled H. El-Maleh, Eddie-Lun Tik Choy, Arasanipalai K. Ananthapadmanabhan, Andrew P. DaJaco, Pengjun Huang
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Publication number: 20090281796Abstract: Wideband speech signals must be converted to narrowband speech signals if the transmission medium or the destination terminal is constructed with narrowband constraints. A typical wideband-to-narrowband conversion method is the elimination of frequencies above 3400 Hz using a low pass filter and a down sampler. However, this method produces a muffled speech sound since the resulting narrowband signal has a flat frequency response. Methods and apparatus are presented herein to enhance the acoustic quality of a wideband-to-narrowband converted signal. A bandwidth switching filter is used to emphasize a mid-range frequency portion of the wideband signal so that the resulting narrowband signal has a non-flat frequency spectrum.Type: ApplicationFiled: July 10, 2009Publication date: November 12, 2009Applicant: QUALCOMM IncorporatedInventors: Khaled H. El-Maleh, Arasanipalai K. Ananthapadmanabhan, Andrew P. Dejaco
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Patent number: 7590096Abstract: A system and method for detection of rate determination algorithm errors in variable rate communications system receivers. The disclosed embodiments prevent rate determination algorithm errors from causing audible artifacts such as screeches or beeps. The disclosed system and method detects frames with incorrectly determined data rates and performs frame erasure processing and/or memory state clean up to prevent propagation of distortion across multiple frames. Frames with incorrectly determined data rates are detected by checking illegal rate transitions, reserved bits, validating unused filter type bit combinations and analyzing relationships between fixed code-book gains and linear prediction coefficient gains.Type: GrantFiled: September 9, 2004Date of Patent: September 15, 2009Assignee: QUALCOMM IncorporatedInventors: Khaled H. El-Maleh, Eddie-Lun Tik Choy, Arasanipalai K. Ananthapadmanabhan, Andrew P. DeJaco, Pengjun Huang
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Patent number: 7577563Abstract: Wideband speech signals must be converted to narrowband speech signals if the transmission medium or the destination terminal is constructed with narrowband constraints. A typical wideband-to-narrowband conversion method is the elimination of frequencies above 3400 Hz using a low pass filter and a down sampler. However, this method produces a muffled speech sound since the resulting narrowband signal has a flat frequency response. Methods and apparatus are presented herein to enhance the acoustic quality of a wideband-to-narrowband converted signal. A bandwidth switching filter is used to emphasize a mid-range frequency portion of the wideband signal so that the resulting narrowband signal has a non-flat frequency spectrum.Type: GrantFiled: September 22, 2006Date of Patent: August 18, 2009Assignee: Qualcomm IncorporatedInventors: Khaled H. El-Maleh, Arasanipalai K. Ananthapadmanabhan, Andrew P. DeJaco
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Patent number: 7113522Abstract: Wideband speech signals must be converted to narrowband speech signals if the transmission medium or the destination terminal is constructed with narrowband constraints. A typical wideband-to-narrowband conversion method is the elimination of frequencies above 3400 Hz using a low pass filter and a down sampler. However, this method produces a muffled speech sound since the resulting narrowband signal has a flat frequency response. Methods and apparatus are presented herein to enhance the acoustic quality of a wideband-to-narrowband converted signal. A bandwidth switching filter is used to emphasize a mid-range frequency portion of the wideband signal so that the resulting narrowband signal has a non-flat frequency spectrum.Type: GrantFiled: January 24, 2001Date of Patent: September 26, 2006Assignee: QUALCOMM, IncorporatedInventors: Khaled H. El-Maleh, Arasanipalai K. Ananthapadmanabhan, Andrew P. DeJaco
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Patent number: 6804218Abstract: A system and method for detection of rate determination algorithm errors in variable rate communications system receivers. The disclosed embodiments prevent rate determination algorithm errors from causing audible artifacts such as screeches or beeps. The disclosed system and method detects frames with incorrectly determined data rates and performs frame erasure processing and/or memory state clean up to prevent propagation of distortion across multiple frames. Frames with incorrectly determined data rates are detected by checking illegal rate transitions, reserved bits, validating unused filter type bit combinations and analyzing relationships between fixed code-book gains and linear prediction coefficient gains.Type: GrantFiled: December 4, 2000Date of Patent: October 12, 2004Assignee: Qualcomm IncorporatedInventors: Khaled H. El-Maleh, Eddie-Lun Tik Choy, Arasanipalai K. Ananthapadmanabhan, Andrew P. DeJaco, Pengjun Huang
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Publication number: 20030012221Abstract: Wideband speech signals must be converted to narrowband speech signals if the transmission medium or the destination terminal is constructed with narrowband constraints. A typical wideband-to-narrowband conversion method is the elimination of frequencies above 3400 Hz using a low pass filter and a down sampler. However, this method produces a muffled speech sound since the resulting narrowband signal has a flat frequency response. Methods and apparatus are presented herein to enhance the acoustic quality of a wideband-to-narrowband converted signal. A bandwidth switching filter is used to emphasize a mid-range frequency portion of the wideband signal so that the resulting narrowband signal has a non-flat frequency spectrum.Type: ApplicationFiled: January 24, 2001Publication date: January 16, 2003Inventors: Khaled H. El-Maleh, Arasanipalai K. Ananthapadmanabhan, Andrew P. DeJaco
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Publication number: 20020069380Abstract: A system and method for detection of rate determination algorithm errors in variable rate communications system receivers. The disclosed embodiments prevent rate determination algorithm errors from causing audible artifacts such as screeches or beeps. The disclosed system and method detects frames with incorrectly determined data rates and performs frame erasure processing and/or memory state clean up to prevent propagation of distortion across multiple frames. Frames with incorrectly determined data rates are detected by checking illegal rate transitions, reserved bits, validating unused filter type bit combinations and analyzing relationships between fixed code-book gains and linear prediction coefficient gains.Type: ApplicationFiled: December 4, 2000Publication date: June 6, 2002Inventors: Khaled H. El-Maleh, Eddie-Lun Tik Choy, Arasanipalai K. Ananthapadmanabhan, Andrew P. DeJaco, Pengjun Huang